Messages in this thread | | | Date | Sun, 20 Nov 2005 12:35:36 +0200 | From | Muli Ben-Yehuda <> | Subject | Re: Inconsistent timing results of multithreaded program on an SMP machine. |
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On Sun, Nov 20, 2005 at 09:28:13PM +1100, Con Kolivas wrote:
> Ok I've had a look at the actual program now ;) Are you timing the time it > takes to completion of everything? > > This part of your program: > for (i= 0; i<8; i++) > pthread_join(tid[i], NULL); > > Cares about the order the threads finish. Do you think this might be affecting > your results?
I don't see why it should matter. Depending on the order the threads finish, we will always wait in pthread_join until the last one finishes, and then do between 0 and 7 more pthread_joins that should return immediately (since the last one has already finished).
Cheers, Muli -- Muli Ben-Yehuda http://www.mulix.org | http://mulix.livejournal.com/
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